2 Corinthians 13:4 - For to be sure, Christ was crucified in weakness, yet He lives by God’s power. Likewise, we are weak in Him, yet by God’s power we will live with Him to serve you.
In order to live on earth and be like us Jesus was made weak. He was made like us in every way, yet He was without sin. How did He do it? He surrendered His life completely to God. Christ did not find His own strength to make it through everything; He had to rely on God’s strength and power.
When Jesus went to the cross it showed His weakness; it showed His human side. He was crucified in weakness, but then God’s power was made complete in Him through resurrection. Now He lives by God’s power.
We too must recognize that we are weak. In our own power and ability there is nothing that we can do. Yet just as Christ was able to live by God’s power, we also can live by God’s power through Him.
For the last couple of chapters Paul has been talking about weaknesses. He tells us that if he is going to boast, then he will boast in his weak areas. See, Paul understood that it is only when we see ourselves as we truly are that God can use us. When we see ourselves as weak it allows us to completely rely on God, because we know that we cannot do it on our own.
Let me explain it this way, if we think we are strong enough to handle something on our own, we will never ask for help. And without God’s help in an area His glory will not be able to shine through us. When we are trying to do things in our own ability we will ultimately fail. Even if we make it for a while, it will not last. Surrender to God and find your ability through Him.